CI: determine actual LibreSSL version dynamically

this change introduce "LIBRESSL_VERSION=latest" semantic, which scans
http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/ and detects latest release.

LIBRESSL_VERSION=2.9.2 is removed from the matrix.

(cherry picked from commit 94cd779a4f3f20d5bb10566994c9f55d07e646b7)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 2b33cf5495eb3dfca1be8c859721bf8759f1e6d8)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed